<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>dom操作一</title>
  <link rel="stylesheet" href="./css/h01.css">
</head>

<body>

  <button id="btn01">控制内容</button>
  <div id="div01"></div>

  <hr>
  生日选择：

  <select id="selNian">
    <!-- <option value="1970">1970</option>
    <option value="1971">1971</option> -->
  </select>年
  <select id="selYue"></select>月
  <select id="selDay"></select>日
  

  <hr>

  <div id="divNow"></div>



  <!-- js的导入都在页面的最后 -->
  <script src="./js/h01.js"></script>
</body>

</html>